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C1 and C2 Invisible Ink Investigation

As part of our Science Explore this week we wanted to find out which liquid/solution would be the best for writing superhero secret messages. We used lemon juice, milk and a solution of water and bicarbonate of soda to write invisible 'messages'! For our homework this weekend we have to bake them in the oven to see which liquid/solution is the best for this superhero job!